Marble-sawing machine



A. F. YVARD, OF LOUISVILLE, KENTUCKY.

MARBLE-SAWING MACHINE.

Specification of Letters Patent No. 14,839, dated May 6, 1856.

To all whom t may concern Be it known that I, A. F. VARD, of Louisville,in the county of Jefferson and State of Kentucky, have invented a newand Improved Machine for Sawing Stone; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawings, making a part of this specification,in which- Figure 1, is a side view of my improvement. Fig. 2, is a planor top view of the same. Fig. 3, is a side view of a portion of one ofthe horizontal and vertical rack bars by which the saws are raised andlowered.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a new and improved machine for sawing stone,designed for sawing marble blocks in polygonal taper form, formonuments, fence posts, etc.

The invention consists in the peculiar means employed for raising andlowering the saw frames, whereby stone or marble blocks may be sawed asspecified.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, represents a platform or flooring on which a rectangular frame B, isplaced, and C, represents a vertical frame placed at one side of theframing B, in which a saw frame or sash D, is suspended, said frame orsash D, being allowed to work freely back and forth therein. The frameC, is stationary, and the saw frame or sash D, is suspended within it bychains (a) the lower ends of which are attached to the lower ends of thefront and back uprights of the frame or sash D, said chains passing overpulleys (b) (b) in the upper part of the frame C, both chains beingattached to the inner end of a rack bar E, which is fitted in the underside of the top piece of the frame C. The outer end of the rack bar E,has a chain (c) attached to it, said chain passing over a pulley (d) atthe end of the top piece of the frame C, and having a weight (e) securedto its' end.

F, is a bar, the upper end of which is attached by a pivot (f) to thetop piece of the frame C. This bar has a rack G, attached to its innerside, which rack is allowed to slide up and down upon the bar. The rackGr, gears into a pinion (g) which is secured in the top piece of theframe C, and this pinion also gears into the rack bar E, as clearlyshown in Fig. 3. To the lower end of the bar F, there is attached oneend Aof a pitman H, the opposite end of said pitman being attached to acrank (h) on a vertical shaft I, which is fitted in one end of the frameB.

J, is a connecting rod, one end of which is attached to the lower end ofthe rack G, and the opposite end to the lower end of the saw frame orsash D.

K, is a vertical frame which is constructed precisely the same as theframe C. The frame K, however is not attached to the frame B, but oneend works on the shaft I, as a center. The oppositeA end of the frame K,has a vertical shaft L, fitted to it, said shaft having a pinion at eachend, which pinions gear into racks M, M, attached to segment bars N, N,which are portions of circles of which the shaft I, is the center. Onthe center of the shaft L, there is placed a bevel wheel (j) in which apinion (lo) on ashaft (l) gears. The frame K, has a saw frame or sash D,fitted within it, and said frame or sash has the same appurtenancesattached to it, as the frame or sash D, and the same let-ters ofreference are used.

It will be seen that the frame K, may be set at any angle with the frameC, by merely turning the shaft (Z) and a reciprocating motion will begiven the two saw frames or sashes D, D, by turning the shaft I, as bothpitmen H, are connected with the crank The marble block is placedunderneath the saw frames or sashes, and two opposite sides of the blockwill be sawed at the same time, the taper of the block of coursecorresponding to the relative angular position of the frame K, with theframe C. The saws feed themselves to their work by their own gravity,the weights (e) (e) serving as counterpoises, and it will be seen thatthe frames or sashes will descend vertically, and also the connectingrods J, J, in consequence of the chains (a) (a) and rack bars E, Gr,connected by the pinion If desired the frame C, may be made adjustablethe same as the frame K.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is,

Suspending the saW frames or sashes D, D, Within the frames C, K, bymeans of 5 the chains (a) (a) Which are attached to rack bars E, havingWeights or counterposes (e) connected to them, the rack bar E, beingconnected by pnons (g) With rack

